Syntax

Parameters

Return value

Type:

Type: LRESULT

The return value specifies the value returned by the window procedure. Although its meaning depends on the message being dispatched, the return value generally is ignored.

Remarks

The MSG structure must contain valid message values. If the lpmsg parameter points to a WM_TIMER message and the lParam parameter of the WM_TIMER message is not NULL, lParam points to a function that is called instead of the window procedure.

Note that the application is responsible for retrieving and dispatching input messages to the dialog box. Most applications use the main message loop for this. However, to permit the user to move to and to select controls by using the keyboard, the application must call IsDialogMessage. For more information, see Dialog Box Keyboard Interface.